Most likely it would. Not saying it was right or responsible just that things tend to get out of hand when the frustration level reaches a certain point. Remember they can do the same with the frequency checker as you have suggested. I wouldn't want someone sitting outside my club with one and using it to crash plane after plane.

It might be worth contacting the land owner and make him aware of MAAC being the governing body for model aviation. Bring with you our insurance policy showing where with registered fields the land owner is covered by insurance for claims against him where these guys do not provide him with the same coverage. In the event of an incident he could be named in any legal action. Show him a copy of the recommended distances between clubs to meet MAAC approval and explain the interference problem. Explain to him the increased risk of loss of control due to this interference. Also explain that you have tried to resolve this issue by offering to work out a solution with these fliers but to no avail. Explain that you are approaching him as a last resort first of all to make him aware of the insurance issues and second the lack of co-operation of those using his land with or without his permission. Explain to him that if this last measure fails to resolve the problem that your club has acted in a reasonable and prudent manner with the safety of the general public first and foremost in mind and are left with no choice but to inform MAAC head office by registered letter of which he will receive a copy outlining the problem and attempted solutions. In the case of an incident the courts may indeed look at the responsibilities of all parties involved and may take into consideration which party has the care and concern for the general public at the forefront of its base of operations.

Dennis